Improvement in fire-escapes



J. DAVENPORT.

FIRE-ESCAPES.

No 195,747, Patented Oct.2,1877.

ATTORNEYS.

NJETERS, PHOTO-UTHOGRAF'HER. WASIHQIGTON D C,

UNITED STATES PATENT OFFICE.

JOSEPH DAVENPORT, OF MASSILLON, OHIO.

IMPROVEMENT IN Fl RE-ESCAPES.

Specification forming part of Letters Patent No. 195,747, dated October2, 1877 application filed July 9, 1877'.

portions of buildings.

Referring to the drawing, A is a platform supported upon a truck, B,which may be of any ordinary construction. Upon the platform A fourT-shaped guides, G, are secured,

which are placed at right angles to each other, and upon each of which ahead or slide, D, is placed.

I Four sets of bars, a, are jointed together to form the well-knownlazy-tongs, and are secured together at their outer joints by the curvedpieces I), which are apertured at their ends to receive the bolts of thejoints. The bars of each series thus united diminish in length towardthetop of the series, so that all,

when united, form a structure of pyramidal shape.

E E are levers, that are pivotedinstandards F attached to the platformA, and extend outward under the central joint of the lower bars a, andinward under a plate, G.

Pulleys c are journaled between ears projecting from the under surfaceof the plate F. Ropes or chains 01 are attached to the slides D, and runover the pulleys c, and downward to a Windlass, G, under the platform A,to which Windlass they are attached.

The Windlass G has upon it a spur-wheel, e, that is driven by apinion,f, on the shaft 9, which is journaled to the truck-frame, and isprovided with cranks H, having a jointed handle, I, that may be foldedup when not in use. The said handle is provided with shoulders that areengaged by a spring-key when the handle is either open or folded.

At the top of the device a basket, J, is suspended by cords z from thecorner curxed pieces b, that connect the upper bars.

By turning the Windlass G the rope or chain (1 is drawn over the pulleyc, and the slides D are drawn toward the center of the platform A, andat the same time the plate G is drawn downward, carrying with it theinner ends of the levers E, the outer ends raising and carrying withthem the lower pairs of jointed bars, causing the four series of bars tomove upward, carrying with them the basket J. The basket is lowered byreversing the operation.

The platform A may be provided with screws, by which it may be inclinedso as to throw the fire-escape toward the building when required.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of the windlass G, plate G,carrying pulleys c, levers E, the platform A, having guides O, and thebars a, jointed together, as described.

2. The combination of the levers E, having their front ends under plateG pivoted to standards F, and extended out under the central joint ofbars a, with a lazy-tongs fire-escape, as and for the purpose specified.

JOSEPH DAVENPORT.

Witnesses:

THOMAS BLACKBURN, WILL. J. OBERLIN.

